const

[Walter Bright]

Benji Smith wrote:
> I was thinking the same thing myself, which is one of the reasons I 
> dislike the constness being part of the type. In C++ "register" isn't 
> part of the type system. It's just an optimization hint.

It can't be just an optimization hint. For example, if I pass const(T*) 
to a function foo(), that means I want to guarantee that foo() does not 
change it. Having the compiler accept that foo() changes it, and so 
disable some optimization somewhere, does me no good at all.